Hello, I installed it with just sudo apt install pulseaudio and without configuration. In Firefox it uses Alsa instead of PulseAudio and in media players it does not work.
If I do killall pulseaudio pulseaudio --start Works in Firefox and media players. My user and pulse user are in the "audio" group. sudo grep "pulseaudio" /var/log/syslog Oct 7 10:09:32 debian systemd[669]: Not generating service for XDG autostart app-pulseaudio-autostart.service, startup phases are not supported. Oct 7 10:10:20 debian pulseaudio[671]: E: [alsa-sink-ALC898 Analog] alsa-sink.c: Error opening PCM device front:0: Aucun fichier ou dossier de ce type Oct 7 10:10:20 debian systemd[735]: Not generating service for XDG autostart app-pulseaudio-autostart.service, startup phases are not supported. Oct 7 10:10:20 debian systemd[651]: pulseaudio.service: Succeeded. Oct 7 10:10:22 debian pulseaudio[737]: W: [pulseaudio] authkey.c: Failed to open cookie file '/home/tupo/.config/pulse/cookie': Aucun fichier ou dossier de ce type Oct 7 10:10:22 debian pulseaudio[737]: W: [pulseaudio] authkey.c: Failed to load authentication key '/home/tupo/.config/pulse/cookie': Aucun fichier ou dossier de ce type Oct 7 10:10:30 debian systemd[651]: pulseaudio.socket: Succeeded.